Headphone set



FIG. 1 is a front perspective view of a headphone set, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another front perspective view thereof.

The broken lines in FIGS. 1-8 depict portions of the headphone set that form no part of the claimed design. 

CLAIM The ornamental design for a headphone set, as shown and described. 